1984 Transamerica Open – Singles

Ivan Lendl was the defending champion, but did not compete this year due to Davis Cup obligations.

John McEnroe won the title by defeating Brad Gilbert 6–4, 6–4 in the final.

Seeds
• # 🇺🇸 John McEnroe (champion)

• # 🇺🇸 Gene Mayer (first round)

• # 🇺🇸 Eliot Teltscher (semifinals)

• # 🇺🇸 Tim Mayotte (first round)

• # 🇺🇸 Scott Davis (first round)

• # Kevin Curren (quarterfinals)

• # 🇦🇺 Paul McNamee (second round)

• # 🇺🇸 Brad Gilbert (final)